Template methods on Timer classes instead of the classes themselves.

chrome/browser/extensions/webstore_installer.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALLER_H_
 #define CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALLER_H_
 
 #include <list>
 #include <string>
 
@@ skipping 258 matching lines @@
   Profile* profile_;
   Delegate* delegate_;
   std::string id_;
   InstallSource install_source_;
   // The DownloadItem is owned by the DownloadManager and is valid from when
   // OnDownloadStarted is called (with no error) until OnDownloadDestroyed().
   content::DownloadItem* download_item_;
   // Used to periodically update the extension's download status. This will
   // trigger at least every second, though sometimes more frequently (depending
   // on number of modules, etc).
-  base::OneShotTimer<WebstoreInstaller> download_progress_timer_;
+  base::OneShotTimer download_progress_timer_;
   scoped_ptr<Approval> approval_;
   GURL download_url_;
   scoped_refptr<CrxInstaller> crx_installer_;
 
   // Pending modules.
   std::list<SharedModuleInfo::ImportInfo> pending_modules_;
   // Total extension modules we need download and install (the main module and
   // depedences).
   int total_modules_;
   bool download_started_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALLER_H_